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Impact Of Cross-Client Heterogeneity In Federated Learning For Real-World Plant Disease Classification, Ritesh Janga Jan 2026

Impact Of Cross-Client Heterogeneity In Federated Learning For Real-World Plant Disease Classification, Ritesh Janga

All Graduate Theses, Dissertations, and Other Capstone Projects

Deep learning applications are being adopted in agricultural image analysis that include challenges of data privacy and limited institutional data and heterogeneity of different types of architectures. However, Federated Learning is a model that allows collaborative training on data that does not have to be shared among parties. Therefore, Federated Learning is an effective method of collaborative training; however, its comparative effectiveness as compared to individual (local) training on diverse architectures has never been examined in an agricultural context. The objective of this study was to examine Federated Learning for the purpose of crop disease classification on extreme non-IID distributed …


Soil Organic Carbon And Soil Health Property Responses To Land Management Across Topographic Positions, Mia D. Makovsky Jan 2026

Soil Organic Carbon And Soil Health Property Responses To Land Management Across Topographic Positions, Mia D. Makovsky

All Graduate Theses, Dissertations, and Other Capstone Projects

uring the last ice age, ice sheets advanced and retreated across the upper Midwest, leaving behind a landscape characterized by poorly drained hummocky topography. Well-aerated soils have formed on uplands and lowlands are dominated by hydric soils. These wetlands and hydric soils have potential to store large quantities of carbon, particularly compared to the well-aerated uplands, but many have been drained and cultivated for decades. Conservation agriculture methods have emerged to protect and conserve soil health from negative effects due to cultivation.The purpose of this study is to determine how agricultural management practices and landscape properties (e.g, topographic position) affect …


Toward Interpretable Multi-Omics Multimodal Biomedical Artificial Intelligence, Yanjun Lyu Jan 2026

Toward Interpretable Multi-Omics Multimodal Biomedical Artificial Intelligence, Yanjun Lyu

Computer Science and Engineering Dissertations

The complexity of human disease arises from biological processes that unfold across multiple scales, from molecular variation through cellular function, tissue organisation, brain phenotypes, each of which is associated with distinct measurement modalities, regularities, and characteristic. Contemporary biomedical artificial intelligence has brought the opportunity to reveal the complexity with in; however, its methodological default, in which models are trained on most readily available modality, does not adequately engage with the multi-scale connected structure by which biological meaning is constituted. The research area of multi-omics and multi-modal AI for biomedicine remains at an early exploratory stage, and the work presented in …


Health Disparities In Cardiovascular Care: The Impact Of Diabetes Education And Post-Discharge Interventions For African American Adults At Risk For And After Myocardial Infarction, Trinity L. Billingsley Jan 2026

Health Disparities In Cardiovascular Care: The Impact Of Diabetes Education And Post-Discharge Interventions For African American Adults At Risk For And After Myocardial Infarction, Trinity L. Billingsley

Nursing | Senior Theses

Background: Cardiovascular disease is the leading cause of death in the United States, affecting African American adults at higher rates compared to other racial and ethnic groups. Diabetes as a comorbidity is one of the risk factors of experiencing a myocardial infarction, remaining one of the leading causes of death among individuals with diabetes. Objective: To examine the effectiveness of structured diabetes education tailored to African American adults who are at risk for and after a myocardial infarction. Additionally assessing the complications of a myocardial infarction, the outcomes associated with structured education will be compared to the outcomes of …


High Potential, Uneven Uptake: Off-Grid Renewables In Agriculture Across The Global South, Muhamad Setyawan Bahari, Destia Mardhotillah Jan 2026

High Potential, Uneven Uptake: Off-Grid Renewables In Agriculture Across The Global South, Muhamad Setyawan Bahari, Destia Mardhotillah

ASEAN Journal on Science and Technology for Development

Reliable energy access is widely recognized as essential for agricultural development, yet adoption of off-grid renewable energy technologies (RETs) in the Global South remains uneven despite their high potential. While RETs are increasingly promoted as solutions to food insecurity and energy poverty, evidence on what enables or constrains their uptake across agricultural contexts remains fragmented. This study systematically reviews 18 peer-reviewed articles published between 2013 and 2025 using the PRISMA framework and synthesizes findings through a PESTEL lens. The literature has expanded in recent years, reflecting growing policy attention to the energy–agriculture nexus, but remains concentrated in Asia and heavily …


Midwestern Farmers' Willingness To Engage With Precision Agriculture Technologies And On-Farm Precision Experimentation, Reagen G. Tibbs, Nicholas J. Heller, David S. Bullock, Maria A. Boerngen Jan 2026

Midwestern Farmers' Willingness To Engage With Precision Agriculture Technologies And On-Farm Precision Experimentation, Reagen G. Tibbs, Nicholas J. Heller, David S. Bullock, Maria A. Boerngen

Faculty Publications - Agriculture

Precision agriculture technologies (PATs) have revolutionized the agriculture industry and provide many benefits to farmers. Among these benefits is the ability to conduct experiments in a process known as on-farm precision experimentation (OFPE). By conducting these experiments and through collaboration with researchers, crop consultants, and extension agents, farmers can learn site-specific management practices to better address challenges in their operations. However, adoption rates of these technologies have remained below 50% in the United States. Furthermore, very few studies have explored the factors that influence a farmer's decision to conduct experiments, or their willingness to collaborate with external stakeholders such as …


Characterization Of The Genetic Diversity Of Curlyleaf Pondweed (Potamogeton Crispus L.) In The Contiguous United States And Canada And Analysis Of Possible Hybrid Potamogeton Crispus Lineages, Mallory M. Kaiser Jan 2026

Characterization Of The Genetic Diversity Of Curlyleaf Pondweed (Potamogeton Crispus L.) In The Contiguous United States And Canada And Analysis Of Possible Hybrid Potamogeton Crispus Lineages, Mallory M. Kaiser

All Graduate Theses, Dissertations, and Other Capstone Projects

Curlyleaf Pondweed (Potamogeton crispus L.) is a prolific invasive species that has spread across the United States and into parts of Canada since its introduction to North America in the 1840s. It causes extensive economic and environmental damage across its invasive range, and its control and eradication are of utmost importance to agricultural, ecological, recreational, and transportational stakeholders. Developments in molecular ecology and invasive management have found that genetic diversity and hybridization of aquatic macrophytes may affect their susceptibility to herbicide treatments, and genotype or lineage identification are important control variables that must be considered in field and …


Preserved Artificial Grammar Learning In Individuals With Parkinson’S Disease: A Systematic Review, Sarah I. Cranna Jan 2026

Preserved Artificial Grammar Learning In Individuals With Parkinson’S Disease: A Systematic Review, Sarah I. Cranna

Honors Theses and Capstones

Abstract

            Implicit statistical learning is a crucial cognitive function that is highly involved in the learning and processing of language. Since both language and implicit statistical learning are supported by the basal ganglia through cortico-striatal networks, disruptions to this network could result in their impairment. Parkinson’s Disease (PD) can therefore be used to model disruptions to this system as it is primarily characterized by dysfunction in the basal ganglia. Thus, this review aims to examine the current literature studying the performance of individuals with PD on artificial grammar tasks in order to investigate the impact of impaired basal ganglia function …


Frame: Fast Reference-Based Ancestry Makeup Estimation Tool, Pramesh Shakya, Ardalan Naseri, Degui Zhi, Shaojie Zhang Jan 2026

Frame: Fast Reference-Based Ancestry Makeup Estimation Tool, Pramesh Shakya, Ardalan Naseri, Degui Zhi, Shaojie Zhang

Faculty, Staff and Student Publications

Motivation: The availability of large-scale genetic data presents a unique opportunity to study the genetic ancestries of individuals, which requires an efficient and scalable method. The existing global ancestry methods are accurate, but they cannot scale to large genetic datasets. Identity-by-descent (IBD) segments are DNA segments shared by individuals such that they are inherited from a common recent ancestor without recombination. These IBD segments, which reflect co-ancestry, provide an efficient alternative for inferring genetic ancestry.

Results: We introduced a reference-based global ancestry inference method called FRAME (Fast Reference-based Ancestry Makeup Estimation). FRAME utilizes partial local ancestry information estimated through IBD …


A Re-Evaluation Of Atlantic Bluefin Tuna (Thunnus Thynnus) Spawning Distribution In The Western Atlantic Ocean, David E. Richardson, Katrin E. Marancik, Malgorzata Adamus, Elizabeth A. Broughton, Robert K. Cowen, Trika Gerard, Christina M. Hernández, John J. Hoey, Joel K. Llopiz, Molly E. Lutcavage, Estrella Malca, Debra L. Palka, Lourdes Vásquez-Yeomans, Harvey J. Walsh, C. Michelle Willis, Glenn A. Zapfe Jan 2026

A Re-Evaluation Of Atlantic Bluefin Tuna (Thunnus Thynnus) Spawning Distribution In The Western Atlantic Ocean, David E. Richardson, Katrin E. Marancik, Malgorzata Adamus, Elizabeth A. Broughton, Robert K. Cowen, Trika Gerard, Christina M. Hernández, John J. Hoey, Joel K. Llopiz, Molly E. Lutcavage, Estrella Malca, Debra L. Palka, Lourdes Vásquez-Yeomans, Harvey J. Walsh, C. Michelle Willis, Glenn A. Zapfe

Biological Sciences Faculty Publications

There is currently a lack of consensus on the spatial, seasonal and decadal-scale patterns of Atlantic bluefin tuna (Thunnus thynnus) spawning in the western Atlantic Ocean. We compiled ichthyoplankton and reproductive data to characterize bluefin spawning patterns and the uncertainty in these patterns. Ichthyoplankton data indicates that bluefin spawn in the Gulf of America/Gulf of Mexico, northwest Caribbean Sea, north of the Bahamas, along the inshore edge of the Florida Current off the Carolinas and in the western Slope Sea. Reproductive studies identified these same spawning areas, as well as the Windward Passage and waters east of the …


Lingnan Gardeners Newsletter (No. 77) = 彩園通訊 (第77期), Lingnan Gardeners, Centre For Cultural Research And Development, Lingnan University Jan 2026

Lingnan Gardeners Newsletter (No. 77) = 彩園通訊 (第77期), Lingnan Gardeners, Centre For Cultural Research And Development, Lingnan University

Lingnan Gardeners Newsletter 嶺南彩園通訊

No abstract provided.


Wearable Sensor-Based Phase Segmentation Analysis Of Front Crawl Swimming: A Scoping Review, Jonathan Simoes, Samuel Aylward, Daniel Hamze, Daniel James Goble, Daniel M. Russell, Joshua Haworth Jan 2026

Wearable Sensor-Based Phase Segmentation Analysis Of Front Crawl Swimming: A Scoping Review, Jonathan Simoes, Samuel Aylward, Daniel Hamze, Daniel James Goble, Daniel M. Russell, Joshua Haworth

Exercise Science Faculty Publications

Front crawl swimming stroke phase segmentation has historically relied on video analysis, but the development of wearable sensor technology has created new opportunities for automated phase segmentation. This scoping review mapped the available evidence on wearable sensor-based stroke phase segmentation methods in front crawl swimming, following PRISMA-ScR guidelines. A systematic search of SPORTDiscus, Web of Science, and IEEE Xplore conducted from January to June 2026, identified 15 eligible peer-reviewed studies published between 2000 and 2024. The review revealed an emerging field of research that has converged methodologically around inertial measurement units (IMUs) and the Chollet phase segmentation framework while remaining …


Inpatient Stroke Quality Improvement, Briyawna N. Wyatt Jan 2026

Inpatient Stroke Quality Improvement, Briyawna N. Wyatt

Doctor of Nursing Practice (DNP) Scholarly Projects - Archive

Inpatient nursing documentation for stroke care is essential for meeting quality metrics, maintaining continuity, and supporting timely decisions. Gaps can lead to inconsistent care, metric failures, and reduced staff confidence. This quality improvement initiative aimed to improve metric compliance, documentation consistency, and nursing knowledge and satisfaction. A three-part intervention included targeted education, a standardized documentation verification form, and ongoing feedback from stroke champions. Outcomes measured were metric compliance, knowledge (pre/posttests), documentation completeness (Venous Thromboembolism (VTE), education, Modified Rankin Scale), and staff satisfaction. Results showed significant improvement in nursing knowledge (p < .005), reduced metric fallouts, and better documentation across all indicators. Staff satisfaction increased by about 20%. Overall, combining education, standardized tools, and continuous feedback improved documentation practices, enhanced compliance with stroke metrics, and increased nursing knowledge and satisfaction, supporting better care processes and patient outcomes.


Managing Dietary Nonstructural Carbohydrates In Insulin Dysregulated Horses: Pasture, Long-Stem Forage, And Restrictive Grazing Strategies, Morgan J. Askins Jan 2026

Managing Dietary Nonstructural Carbohydrates In Insulin Dysregulated Horses: Pasture, Long-Stem Forage, And Restrictive Grazing Strategies, Morgan J. Askins

Theses and Dissertations--Veterinary Science

Insulin dysregulation (ID) is a complex endocrine disorder, impacting a large percentage of the equine population. ID is the defining characteristic of equine metabolic syndrome (EMS). Within the various classifications of EMS horses, the commonality is ID and their higher risk of laminitis. To mitigate insulin response and laminitis risk in ID horses, current management focuses on restricting pasture exposure and feeding low nonstructural carbohydrate (NSC) rations. Minimal studies have evaluated how ID horses respond to pasture of various NSC, long-stem forages, and restrictive grazing strategies. Providing horse owners and managers with improved nutritional management recommendations for ID horses with …


Investigating The Full Annual Cycle Ecology Of Eastern Whip-Poor-Wills Breeding In Central Appalachian Forests, Nicole Notarianni Jan 2026

Investigating The Full Annual Cycle Ecology Of Eastern Whip-Poor-Wills Breeding In Central Appalachian Forests, Nicole Notarianni

Theses and Dissertations--Forestry and Natural Resources

Data on habitat needs of migratory birds across the annual cycle is critical for the development of effective management plans, particularly for declining species. One declining species, the eastern whip-poor-will (Antrostomus vocerifus; EWPW) lacks data on habitat selection patterns through the annual cycle, and this knowledge is particularly scarce for the breeding season. In this thesis, I used archival GPS tags on EWPW to: 1) assess patterns of breeding habitat space-use for 11 EWPW breeding in central Pennsylvania, and 2) describe broad space-use patterns during migration and wintering seasons. Breeding data were paired with three LiDAR-derived habitat metrics: …


Using Camera-Based Unmarked Spatial Capture-Recapture Modeling To Estimate Reintroduced Elk (Cervus Canadensis) Population Parameters And Distribution In Southeastern Kentucky, Claire Marie Muia Jan 2026

Using Camera-Based Unmarked Spatial Capture-Recapture Modeling To Estimate Reintroduced Elk (Cervus Canadensis) Population Parameters And Distribution In Southeastern Kentucky, Claire Marie Muia

Theses and Dissertations--Forestry and Natural Resources

Estimation of population parameters is important for wildlife management decisions. Elk reintroduced to southeastern Kentucky experienced early irruptive population growth and are currently monitored using a statewide harvest-based statistical population reconstruction model (SPR) across the Kentucky Elk Restoration Zone (KERZ). Because the SPR model is spatially coarse and difficult to scale to the smaller management units comprising the KERZ, we conducted a spatially explicit capture-recapture study using a clustered camera-trapping array deployed for 10 weeks from June–August 2024 to estimate elk population parameters within Management Unit 4. Due to a lack of resights of GPS-marked elk, population parameters were estimated …


Non-Invasive Detection Of Intracranial Pressure, Andrei V. Nesterenko Jan 2026

Non-Invasive Detection Of Intracranial Pressure, Andrei V. Nesterenko

Honors Undergraduate Theses

Intracranial pressure is a critical metric used when managing tumors, strokes, TBIs, hydrocephalus, and other operative conditions. Traditional methods for continuous ICP monitoring, intraparenchymal catheters, epidural transducers etc., are invasive and carry a high risk of infection. Previous attempts to create accurate, easy to use, and non-invasive ICP monitoring techniques have been unsuccessful. In this study, we investigated the utility of supraorbital and posterior auricular photoplethysmography to monitor changes in ICP during orthostatic tilt and hyperventilation, which increase and decrease ICP respectively.

Through a continuous 5-minute recording on a tilt-table we characterized SOA and PAA waveforms in 12 participants (ages …


Nanosecond Electric Pulses As A Novel In Situ Vaccination Strategy For Cancer Treatment: Mechanisms, Challenges And Prospects, Siqi Guo Jan 2026

Nanosecond Electric Pulses As A Novel In Situ Vaccination Strategy For Cancer Treatment: Mechanisms, Challenges And Prospects, Siqi Guo

Bioelectrics Publications

Nanosecond electric pulses (nsEPs) are an emerging pulsed-power technology with unique bioelectric characteristics distinct from conventional long-pulse electroporation. As a tunable physical modality, nsEPs can modulate intracellular structures, membrane dynamics, and signaling pathways. Increasing evidence supports nsEPs as a promising non-thermal tumor ablation approach due to their high spatial precision, preservation of critical tissue structures, and minimal adverse effects. One of the most significant discoveries associated with nsEP tumor ablation is the induction of potent systemic antitumor immunity, particularly in situ vaccination (ISV) effects and, in some cases, abscopal effects against distant untreated tumors. Substantial evidence demonstrates that nsEPs can …


Reframing Sexual Assault And Intimate Partner Violence Through A Maternal And Child Health Lens: Implications For Integrated Prevention, Policy, And Practice, Daija C. Gibson Jan 2026

Reframing Sexual Assault And Intimate Partner Violence Through A Maternal And Child Health Lens: Implications For Integrated Prevention, Policy, And Practice, Daija C. Gibson

Theses and Dissertations

Sexual assault and intimate partner violence remain persistent public health concerns in the United States, with significant consequences for individual health, family stability, and population well-being. Although these forms of violence are frequently addressed through criminal justice and behavioral health frameworks, less attention has been given to their implications within maternal and child health, where relational dynamics, life course development, and intergenerational outcomes are central. This study reframed SA and IPV as core MCH issues to examine how integrated, systems-based approaches can strengthen prevention efforts. A structured literature review and systematic synthesis of peer-reviewed studies published between 2015 and 2026 …


Evaluation Of Valley Healthcare System Inc. School-Based Health Clinic/Center At Dorothy I. Heights Elementary School In Columbus, Georgia, Nakia Ford Jan 2026

Evaluation Of Valley Healthcare System Inc. School-Based Health Clinic/Center At Dorothy I. Heights Elementary School In Columbus, Georgia, Nakia Ford

Theses and Dissertations

School-Based Health Centers (SBHCs) are an important strategy for addressing health disparities and improving educational outcomes among underserved students. In Columbus, Georgia, barriers such as limited insurance, transportation challenges, and provider shortages contribute to unmet health needs, which are linked to increased absenteeism. To address these issues, Valley Healthcare System, Inc. (VHCS) implemented a School-Based Health Clinic (SBHC) at Dorothy I. Heights Elementary School. This study evaluates the effectiveness of the SBHC in improving student attendance outcomes. A quasi-experimental, difference-in-differences design compared Dorothy I. Heights Elementary School (treatment group) before and after SBHC implementation (2021–2022 and 2022–2023) with a similar …


Evaluating Soil And Plant Health In A Wide-Row Maize (Zea Mays L.) Production System Integrated With Perennial Cover Crops And Turkey (Meleagris Gallopavo), Sovika Bhattarai Jan 2026

Evaluating Soil And Plant Health In A Wide-Row Maize (Zea Mays L.) Production System Integrated With Perennial Cover Crops And Turkey (Meleagris Gallopavo), Sovika Bhattarai

All Graduate Theses, Dissertations, and Other Capstone Projects

In regions dominated by intensive maize (Zea mays L.) production systems, such as the US Midwest, sustainable agricultural practices such as cover crops and livestock integration are gaining interest for their potential to improve soil, plant, and environmental health. Traditionally, annual cover cropping systems (ACCs) have been used to maintain soil quality and crop performance without compromising ecosystem services. However, the high establishment and management costs of ACCs highlight the need for alternative approaches, such as perennial cover crops (PCCs). Grown as companion crops with maize, PCCs provide extended soil cover and can improve soil biochemical properties (e.g., total C …


Public Perception Of Environmental Contamination And Its Implications For Fish And Community Health In West Bengal, India, Libia Hazra Jan 2026

Public Perception Of Environmental Contamination And Its Implications For Fish And Community Health In West Bengal, India, Libia Hazra

Dissertations, Master's Theses and Master's Reports

In West Bengal, India, the highest fish-consuming state in the country, fish are woven into everyday life, including ceremonies of birth and marriage, prayers offered during harvesting and the cultural memory of communities whose identities are inseparable from aquatic life. However, the rivers, wetlands, and ponds that sustain these fish-human relationships are increasingly threatened by environmental contamination resulting from industrial discharge, agricultural runoff, and inadequate environmental management. Understanding how communities perceive these environmental changes is essential for developing effective conservation and public health strategies.

In collaboration between the Indian Institute of Technology (ITT) Kharagpur, India, and Michigan Technological University (USA), …


Characterization Of The Human Thnatomicrobiome By Decomposition Stage Through Bioinformatic And Meta Data Analysis, Ashton C. Laughlin Jan 2026

Characterization Of The Human Thnatomicrobiome By Decomposition Stage Through Bioinformatic And Meta Data Analysis, Ashton C. Laughlin

Biology Theses

Estimating the postmortem interval (PMI) is one of the most crucial factors in forensic death investigations. Recent advances in forensic microbiology have led to increased interest in using the study of the human postmortem microbiome, or “thanatomicrobiome,” to improve PMI estimates. In addition to current PMI estimation techniques, microbial community succession could serve as a valuable tool in estimating PMI. Further research is needed to develop a comprehensive understanding of the human postmortem microbiome. The purpose of this study is to contribute to the expansion of this tool by reviewing the current literature and analyzing previously published data using the …


Adversarial Robustness In Biomedical Time-Series Models, Rohan Tiwari Jan 2026

Adversarial Robustness In Biomedical Time-Series Models, Rohan Tiwari

Bioengineering Theses

This study investigates adversarial vulnerabilities in deep learning models for biomedical time-series classification across two clinically important modalities: electrocardiography (ECG) and electroencephalography (EEG). Using the MIT-BIH Arrhythmia and CHB-MIT seizure datasets, I evaluate time-domain attacks (FGSM, PGD), Fourier-domain constrained attacks, and learned spectral perturbations designed to reveal modality-specific sensitivity patterns. Across both tasks, a consistent trend emerges low-frequency components (0–5 Hz) constitute a dominant axis of adversarial vulnerability, with perturbations in this range producing the steepest degradation in classification performance. In ECG models, protecting the physiologically relevant QRS band (5–20 Hz) significantly improves robustness, whereas EEG models remain highly sensitive …


3d-Printed Soy Protein And Microalga Films: A Sustainable Approach With Antioxidant Functionality, Sorour Barekat, Buse Dogan, Sibel Uzuner, Ali Ubeyitogullari Jan 2026

3d-Printed Soy Protein And Microalga Films: A Sustainable Approach With Antioxidant Functionality, Sorour Barekat, Buse Dogan, Sibel Uzuner, Ali Ubeyitogullari

Food Science Faculty Publications and Presentations

This study investigated the optimization and fabrication of soy protein isolate (SPI)-green microalga (MA) 3D-printed films. For optimizing 3D printing, the effects of MA concentration, nozzle size (0.52-0.81 mm), and speed (10-20 mm/s) were examined. The printed films were then dried, and color, mechanical properties, water vapor permeability, structure, and antioxidant activity were analyzed. All the formulations showed shear-thinning behavior and rapid recovery. The concentration of 3 % MA, nozzle size of 0.72 mm, and printing speed of 20 mm/s were selected as the optimized conditions for the best 3D printability. Compared with the control, their elongation at break decreased …


Electronic Bills Of Lading And Blockchain Technology: A Regulatory Perspective, Hsin-Hua Tsai Jan 2026

Electronic Bills Of Lading And Blockchain Technology: A Regulatory Perspective, Hsin-Hua Tsai

Journal of Marine Science and Technology–Taiwan

Information and communications technology (ICT) systems are increasingly relevant to the maritime sector. Regarding the revolution of the bill of lading, many shipping lines and other technology startups have been looking into developing viable electronic transport documents that have the same functions as paper bills of lading to reduce supply chain risks. The limitations of the paper-based process have become increasingly visible in the COVID-19 crisis. The main purpose of the article is to analyze the application of blockchain bills of lading, which utilizes computational logic to create the digital ledger, and users can set up algorithms and rules to …


Biological Use Of Molybdenum And Tungsten Stems Back To 3.4 Billion Years Ago, Rika Anderson, Aya S. Klos, Morgan S. Sobol, Joanne S. Boden, Eva E. Stüeken, Kurt O. Konhauser, Betül Kaçar Jan 2026

Biological Use Of Molybdenum And Tungsten Stems Back To 3.4 Billion Years Ago, Rika Anderson, Aya S. Klos, Morgan S. Sobol, Joanne S. Boden, Eva E. Stüeken, Kurt O. Konhauser, Betül Kaçar

Biology Faculty Work

The biological significance of the transition metal molybdenum (Mo) lies in its function at the catalytic center of several enzymes that drive a wide spectrum of redox reactions underlying global biogeochemical cycles, yet a paradox persists. While modern life ubiquitously relies on Mo, geochemical evidence suggests that its availability in early Earth’s anoxic oceans was extremely limited. Modern organisms can use Mo down to trace levels; however, the rates of Mo-dependent metabolisms slow down when Mo availability decreases, posing fundamental questions about the extent to which changing Mo abundances shaped the evolution of molybdoenzymes, and when early life began harnessing …


The Influence Of Localized Water Quality On Eastern Oysters (Crassostrea Virginica) And Their Internal Microbiome Under Changing Environmental Conditions, Jessie Rivera Lafreniere Jan 2026

The Influence Of Localized Water Quality On Eastern Oysters (Crassostrea Virginica) And Their Internal Microbiome Under Changing Environmental Conditions, Jessie Rivera Lafreniere

College of Graduate Studies: Theses & Dissertations

Oysters are found ubiquitously in estuaries along the Georgia coast, where marsh morphology and large daily tidal fluctuations create dynamic and stressful conditions to which oysters may be locally adapted. Based on water quality data from the Sapelo Island National Estuarine Research Reserve, it is evident that changing climatic conditions are rapidly causing shifts in water quality that may be adversely affecting oyster health, especially as ocean acidification alters the carbonate buffering capacity, increasing the amplitude of daily pH variations. Importantly, the rate of change of conditions are not uniform within estuaries, varying on spatial and temporal scales. The symbiotic …


The Effects Of Stress-Related Hormones On Excitatory Synapse Formation, Autumn C. Garvey Jan 2026

The Effects Of Stress-Related Hormones On Excitatory Synapse Formation, Autumn C. Garvey

Honors Undergraduate Theses

Stress profoundly influences brain function through neuromodulatory hormones that regulate synaptic plasticity, yet how temporal patterns of hormone exposure shape excitatory synapse formation remains poorly understood. This study investigates how exposure to stress hormones, norepinephrine and cortisol, affects excitatory synapse development. While existing research primarily compares concentration models, real-world stress occurs in variable patterns that may produce distinct neural outcomes. To address this gap, differentiated Neuro2A neuronal cells are exposed to norepinephrine or cortisol under a continuous treatment paradigm designed to model chronic stress conditions. Following treatment, immunofluorescence imaging is utilized to quantify excitatory synapse formation through analysis of presynaptic …


The Depuration Of Microplastic Pollution In Aquacultured Indian River Lagoon Oysters, Lee Nguyen Jan 2026

The Depuration Of Microplastic Pollution In Aquacultured Indian River Lagoon Oysters, Lee Nguyen

Honors Undergraduate Theses

Plastics are widely used in consumer goods and industrial manufacturing, and their degradation into microplastics (MP, size < 5 mm) has created an emergent environmental pollutant. Plastics readily enter aquatic environments, where they accumulate additional contaminants and bioaccumulate in organisms. While MP contamination in marine ecosystems is well documented, less is known about MP presence in aquacultured shellfish. Depuration, the process of purging contaminants from shellfish, is conducted in sterile seawater without food, which may cause oyster starvation and death. To date, MP depuration has not been examined in the aquacultured eastern oyster (Crassostrea virginica) in published studies. This study had 3 goals: 1) evaluate the effects of algal feed on oyster survival during depuration, 2) determine the effect of algal feed on depuration effectiveness, and 3) investigate the effect of a ten-day depuration on MP concentration in aquacultured C. virginica soft tissue. MP were quantified in oyster tissues, biodeposits, and in industrial algal feed. Tissues were digested using alkaline solutions, manually examined via microscopy, and analyzed using Fourier-Transform Infrared Spectroscopy (FTIR) to investigate MP polymer …